Review navan 19th Oct Frontier (7-2) provided Aidan O'Brien with a sixth consecutive victory in the www.thetote.com/mobile Maiden at Navan.Following in the illustrious hoofprints of the likes of Macarthur, Fame And Glory and Recital, Colm O'Donoghue's mount was sent off the outsider of the two O'Brien representatives, with Thomasgainsborough preferred by punters.However, the market leader showed clear signs of greenness and got going too late to finish third behind Frontier and runner-up Light Heavy.The latter had surrendered the lead approaching the furlong marker and although he fought back close home, the winner had a neck to spare as they crossed the line.On a good day for O'Brien, the Ballydoyle maestro was also on the mark with Harrison's Cave (9-4 favourite), partnered by his son Joseph O'Brien, in the www.thetote.com/mobile Handicap and Tower Rock (5-1), the mount of Seamie Heffernan, in the Irish Stallion Farms EBF Median Auction Maiden.My Girl Anna showed the benefit of a recent Dundalk spin when returning to winning ways in the Derrinstown Stud Apprentice Handicap.Given a confident ride by Mark Enright, the 7-1 shot travelled sweetly before getting to the front and holding market leader Jedward half a length at bay.Antiquus seemed to appreciate the testing going and move up to a more demanding distance in the one-mile www.thetote.com/mobile Nursery Handicap.Joanna Morgan's filly didn't get the clearest of runs when sent off favourite for her nursery debut at Down Royal in September but made amends with a length-and-a-quarter defeat of Danequest in the capable hands of Sam James.Edward Lynam's Fred Fenster (9-10), ridden by Keagan Latham, followed up his recent Cork success with a ready win in the www.thetote.com/mobile Handicap, while the Paul Deegan-trained Midnight Soprano (25-1) registered a surprise triumph the Irish Stallion Farms EBF Fillies Handicap from Sun Disc.